/* ============================================
   MASONRY LAYOUT - Pinterest-Style Grid
   ============================================ */

/* Masonry Grid (natural-ratio, no stretching) */
.masonry-grid {
  column-count: 1;
  column-gap: var(--space-4);
  padding: var(--space-4) 0;
}

@media (min-width: 640px) {
  .masonry-grid {
    column-count: 2;
  }
}

@media (min-width: 1024px) {
  .masonry-grid {
    column-count: 3;
    column-gap: var(--space-6);
  }
}

.masonry-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
  break-inside: avoid;
  margin-bottom: var(--space-4);
  display: block;
}

@media (min-width: 1024px) {
  .masonry-item {
    margin-bottom: var(--space-6);
  }
}

.masonry-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Keep compatibility with JS-assigned size classes */
.masonry-item--small,
.masonry-item--medium,
.masonry-item--large,
.masonry-item--xlarge {
  grid-row-end: auto;
}

.masonry-item__image {
  width: 100%;
  height: auto;
  display: block;
}

.masonry-item__overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-4);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 100%);
  color: var(--color-background);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.masonry-item:hover .masonry-item__overlay {
  opacity: 1;
}

.masonry-item__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.masonry-item__category {
  font-size: var(--font-size-sm);
  opacity: 0.9;
}

/* Masonry Filter Buttons */
.masonry-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.masonry-filter {
  padding: var(--space-3) var(--space-6);
  background: var(--color-background);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.masonry-filter:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.masonry-filter.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-background);
}

/* Masonry with Columns (Alternative approach) */
.masonry-columns {
  column-count: 1;
  column-gap: var(--space-4);
}

@media (min-width: 640px) {
  .masonry-columns {
    column-count: 2;
  }
}

@media (min-width: 1024px) {
  .masonry-columns {
    column-count: 3;
    column-gap: var(--space-6);
  }
}

@media (min-width: 1280px) {
  .masonry-columns {
    column-count: 4;
  }
}

.masonry-columns__item {
  break-inside: avoid;
  margin-bottom: var(--space-4);
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .masonry-columns__item {
    margin-bottom: var(--space-6);
  }
}

.masonry-columns__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.masonry-columns__item img {
  width: 100%;
  display: block;
}

/* Staggered Grid (Alternative Masonry Style) */
.staggered-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .staggered-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .staggered-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.staggered-grid__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.staggered-grid__item:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
  z-index: 10;
}

.staggered-grid__item:nth-child(even) {
  margin-top: var(--space-8);
}

@media (max-width: 767px) {
  .staggered-grid__item:nth-child(even) {
    margin-top: 0;
  }
}

.staggered-grid__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Isotope-style Animation */
.masonry-item.is-hidden {
  display: none;
  opacity: 0;
  transform: scale(0.96);
  pointer-events: none;
}

.masonry-item.is-visible {
  display: block;
  opacity: 1;
  transform: scale(1);
}

/* Loading State */
.masonry-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  color: var(--color-text-muted);
}

.masonry-loading::after {
  content: '';
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Empty State */
.masonry-empty {
  text-align: center;
  padding: var(--space-16);
  color: var(--color-text-muted);
}

.masonry-empty__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  opacity: 0.3;
}

.masonry-empty__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

.masonry-empty__description {
  font-size: var(--font-size-base);
}